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Drops From

An extended super antifire potion is a potion that provides complete immunity against dragonfire for exactly 6 minutes (24 minutes per 4-dose potion). However, the potion's effects will not work on Galvek's attacks, nor will it work on the King Black Dragon's poisonous/shocking/freezing dragonbreath. It will also block Vorkath's attacks only partially. It may only be used after starting Dragon Slayer.

It can be made by a player with 98 Herblore by mixing a regular super antifire and lava scale shards, which grants 40 Herblore experience per shard added, or 160 Herblore experience if they put in four shards into a 4-dosed potion. One dose is created per shard, so four shards will be needed to create a four-dosed extended antifire. Players with 99 Herblore can mix caviar into a 2-dose extended super antifire mix.

Players will get a warning in their chatbox when the potion is about to wear off: "Your super antifire is about to expire." Then they will get another message when it has worn off, approximately 15 seconds after the initial warning: "Your super antifire potion has expired." This allows you to keep track of how long you have until you have to drink again.